Sorry for all of the posts...
I traced signal all the way to CP3, right before the VCA (IC4). I get only sine at CP4. I checked the trimmer for that VCA, it's had an odd reading, so I'm going to attempt swapping it out.
--- In yamahacs80@yahoogroups.com, "leefordwatford@..." <leefordwatford@...> wrote:
>
> Hi, thanks for the group, lots of good info!
>
> I recently acquired a CS60, that mostly works pretty well.
>
> The first, and easiest issue is to find out a modern replacement for the Touch Response light bulb. I'm having some trouble finding a 24v5w equivalent. The #1864 seems close, but is 28v, and I'm not even sure it is the correct base size.
>
>
> The only other issue I've found (other than the need for a good tuning touch-up) is that the 3rd voice does not pass Square, Saw, or Noise. The Sine wave works great, and all other cards work fully.
>
> Where can I start? I've read a few posts here about it possibly being the Wave Shaper or maybe the VCF or VCF master level?
>
> Thanks!
> lee.
>